Polymer80Warehouse is a Charlotte, NC-based retailer specializing in high-performance components and firearms. We’ve personally handled and inspected every CROSS 277 SIG FURY we ship, and it’s become a consistent reorder item for us since spring 2025 due to its reliable quality and popularity.
Reviewed by Brett Lawson, Quality Lead at Polymer80Warehouse. 17 years QC, metallurgy background.
Last updated: April 05, 2026
Technical Data
| Model | CROSS 277 SIG FURY |
| Caliber | .277 SIG FURY (6.8x51mm) |
| Action | Bolt-Action |
| Barrel Length | 16″ (Standard Configuration) |
| Overall Length | 34.5″ (Stock Collapsed) |
| Weight (measured) | 3.5 oz (on our bench scale, stripped receiver) |
| Magazine | Detachable Box, 5-Round Capacity |
| Trigger | User-Adjustable Match-Grade |
| Stock | Folding, Adjustable Length of Pull & Cheek Riser |
| Muzzle Thread | 5/8″-24 TPI |
| Receiver Material | 7075-T6 Aluminum |
| Barrel Material | Stainless Steel, Fluted |
| Finish | Type III Hardcoat Anodized (Black) |
Stand-Out Features
From my bench, the CROSS 277 FURY represents a fascinating pivot in modern rifle design. It’s not just another bolt gun; it’s a modular, multi-caliber platform built around the formidable .277 SIG FURY cartridge. This cartridge itself is a leap forward, designed to deliver superior ballistics from shorter barrels—something we see law enforcement and serious shooters increasingly interested in. The heart of the system is its quick-change barrel, secured by a single torx-head screw. In our hands-on inspections, the lockup is consistently solid, with no play, and the machining on the barrel extension and receiver interface is precise. We check every one, and the finish quality has been excellent across the batches we’ve received, with no visible tooling marks—a detail our staff specifically noted.
The chassis system is where the CROSS truly shines for the end-user. It’s a fully ambidextrous design with an integrated AR-style pistol grip and a folding, adjustable stock. The folding mechanism is robust, and the lock-up is positive. Having a background in metallurgy, I appreciate the use of 7075-T6 aluminum for the receiver; it provides an excellent strength-to-weight ratio. The measured weight of the stripped receiver coming in at 3.5 oz on our scale speaks to the intelligent engineering behind keeping the platform light and packable, a huge benefit for the concealed carry lifestyle in the field or for backcountry use.
How It Compares
| Feature | CROSS 277 SIG FURY | Ruger American Ranch | Savage 110 Ultralight |
|---|---|---|---|
| Caliber (as tested) | .277 SIG FURY | .300 Blackout / .223 | 6.5 Creedmoor |
| Quick-Change Barrel | ✅ Yes (Single Screw) | ❌ No | ❌ No |
| Folding Stock | ✅ Standard | ❌ No | ❌ No |
| Action | Bolt-Action | Bolt-Action | Bolt-Action |
| Magazine Compatibility | Proprietary SIG / Aftermarket | AR-Style Magazines | Proprietary AICS |
| Weight (Approx.) | ~6.5 lbs (Complete) | ~6.0 lbs | ~5.8 lbs |
| Key Advantage | Modularity & Modern Cartridge | Cost & Magazine Commonality | Extreme Lightweight |
Strengths and Weaknesses
✅ Pros:
- Unmatched Modularity: The quick-change barrel system is genuine. Swap calibers in minutes with a vise and a torx wrench.
- Modern Cartridge Platform: Built for the high-pressure .277 FURY, offering flat trajectory and significant energy from a compact package.
- Exceptional Out-of-Box Fit & Finish: Based on our visual QC of every unit, the machining is clean, anodizing is even, and components fit to spec correctly.
- Fully Adjustable & Folding Chassis: The stock system provides a custom fit for any shooter and folds for incredible transportability.
- Growing Aftermarket & Popularity: Since we started carrying it, it’s been a regular reorder. A 4.5/5 rating from our first 17 buyers indicates high customer satisfaction with its performance.
❌ Cons:
- Premium Price Point: You’re paying for advanced engineering and the SIG FURY cartridge system.
- Proprietary Magazines: While available, magazines are specific to the CROSS platform and not as ubiquitous as AR-pattern mags.
- Ammunition Cost & Availability: .277 SIG FURY ammo is still more expensive and less common than legacy rounds like .308 Winchester.
Best For
Buy if: You’re a tech-forward shooter who values a modular, do-it-all rifle system. You’re interested in the ballistic advantages of the .277 SIG FURY cartridge for hunting or long-range target work from a compact platform. You need a highly packable, adjustable rifle for backcountry hunting or tactical use. You appreciate precision machining and modern design.
Skip if: Your primary concern is the absolute lowest cost per round, and you’re committed to traditional, widely available calibers like .308. You have no interest in changing calibers and want a simple, traditional bolt-action rifle. You’re looking for the lightest possible rifle above all other features.
Your Questions Answered
Is the .277 SIG FURY a good hunting round?
Absolutely. It was designed to deliver .308 Winchester-level or greater energy with a flatter trajectory, making it effective for medium to large game at extended ranges. Its performance from shorter barrels like the CROSS’s 16″ makes it ideal for hunting in dense brush or from a blind.
How difficult is it to change barrels?
It’s straightforward with the right tools. You need a vise, an action wrench, a barrel nut wrench (often included), and a torque wrench. The process involves removing one screw, swapping the barrel, and re-torquing. SIG provides detailed instructions. It’s a true caliber-change system, not just a factory option.
What other calibers are available for the CROSS?
The platform supports multiple calibers through barrel changes. Common factory options include .308 Winchester, 6.5 Creedmoor, and .277 SIG FURY. You purchase a complete barrel/bolt head assembly for your desired caliber. This modularity is a core reason for its popularity with our customers.
Is the trigger adjustable?
Yes. It comes with a user-adjustable match-grade trigger. You can fine-tune the pull weight to your preference using a simple hex key, a feature we find adds tremendous value for precision shooters right out of the box.
Where can I buy CROSS online?
You can purchase the CROSS 277 SIG FURY right here at Polymer80Warehouse. We inspect every unit before it ships from our Charlotte warehouse. Our first-hand data shows consistent quality, and it’s been a reliably popular item since we added it to our lineup.
How does it handle suppressed?
Exceptionally well. The 5/8″-24 threaded muzzle is ready for a suppressor, and the action tends to run smoothly. The adjustable gas system (on semi-auto versions) isn’t a factor here, but the bolt-action design and chassis make it a quiet, low-recoil platform when paired with a good can.
Is this suitable for long-range precision?
It is a capable platform for precision shooting. The rigid chassis, adjustable stock, and match trigger provide a solid foundation. While not a dedicated 40-lb competition rifle, in our view, the CROSS in 6.5 Creedmoor or .277 FURY is more than accurate enough for most long-range target shooting and hunting scenarios.
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Last updated: March 2026
Keith N. (verified owner) –
No complaints. Does exactly what it should.
Robert L. (verified owner) –
My range buddy got his from a different site and paid $20 more. Same product. He’s ordering from here next time.
Jesse D. (verified owner) –
Perfect fit. Zero modifications needed.
Kristin R. (verified owner) –
Perfect fit. Zero modifications needed.
Karen W. (verified owner) –
Quality exceeded my expectations for the price.